Version bump to v2.6.0.beta4 (#10933)

Version bump to v2.6.0.beta4 (#10933)

diff --git a/lib/version.rb b/lib/version.rb
index cd39dbc..4e9f726 100644
--- a/lib/version.rb
+++ b/lib/version.rb
@@ -10,7 +10,7 @@ module Discourse
       MAJOR = 2
       MINOR = 6
       TINY  = 0
-      PRE   = 'beta3'
+      PRE   = 'beta4'
 
       STRING = [MAJOR, MINOR, TINY, PRE].compact.join('.')
     end

GitHub sha: bb165ac8

This commit appears in #10933 which was approved by eviltrout. It was merged by nlalonde.